sp_screen.c revision 978c1aa1d0f6fd9a188762a8534de33fc63eeea0 
1/**************************************************************************
2 *
3 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28
29#include "util/u_memory.h"
30#include "util/u_format.h"
31#include "util/u_format_s3tc.h"
32#include "util/u_video.h"
33#include "pipe/p_defines.h"
34#include "pipe/p_screen.h"
35#include "draw/draw_context.h"
36#include "vl/vl_decoder.h"
37#include "vl/vl_video_buffer.h"
38
39#include "state_tracker/sw_winsys.h"
40#include "tgsi/tgsi_exec.h"
41
42#include "sp_texture.h"
43#include "sp_screen.h"
44#include "sp_context.h"
45#include "sp_fence.h"
46#include "sp_public.h"
47
48DEBUG_GET_ONCE_BOOL_OPTION(use_llvm, "SOFTPIPE_USE_LLVM", FALSE)
49
50static const char *
51softpipe_get_vendor(struct pipe_screen *screen)
52{
53   return "VMware, Inc.";
54}
55
56
57static const char *
58softpipe_get_name(struct pipe_screen *screen)
59{
60   return "softpipe";
61}
62
63
64static int
65softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
66{
67   switch (param) {
68   case PIPE_CAP_MAX_COMBINED_SAMPLERS:
69      return PIPE_MAX_SAMPLERS + PIPE_MAX_VERTEX_SAMPLERS;
70   case PIPE_CAP_NPOT_TEXTURES:
71      return 1;
72   case PIPE_CAP_TWO_SIDED_STENCIL:
73      return 1;
74   case PIPE_CAP_SM3:
75      return 1;
76   case PIPE_CAP_ANISOTROPIC_FILTER:
77      return 1;
78   case PIPE_CAP_POINT_SPRITE:
79      return 1;
80   case PIPE_CAP_MAX_RENDER_TARGETS:
81      return PIPE_MAX_COLOR_BUFS;
82   case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
83      return 1;
84   case PIPE_CAP_OCCLUSION_QUERY:
85      return 1;
86   case PIPE_CAP_TIMER_QUERY:
87      return 1;
88   case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
89      return 1;
90   case PIPE_CAP_TEXTURE_SHADOW_MAP:
91      return 1;
92   case PIPE_CAP_TEXTURE_SWIZZLE:
93      return 1;
94   case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
95      return SP_MAX_TEXTURE_2D_LEVELS;
96   case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
97      return SP_MAX_TEXTURE_3D_LEVELS;
98   case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
99      return SP_MAX_TEXTURE_CUBE_LEVELS;
100   case PIPE_CAP_BLEND_EQUATION_SEPARATE:
101      return 1;
102   case PIPE_CAP_INDEP_BLEND_ENABLE:
103      return 1;
104   case PIPE_CAP_INDEP_BLEND_FUNC:
105      return 1;
106   case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
107   case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
108   case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
109   case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
110      return 1;
111   case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
112      return PIPE_MAX_SO_BUFFERS;
113   case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
114   case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
115      return 16*4;
116   case PIPE_CAP_PRIMITIVE_RESTART:
117      return 1;
118   case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
119      return 0;
120   case PIPE_CAP_SHADER_STENCIL_EXPORT:
121      return 1;
122   case PIPE_CAP_TGSI_INSTANCEID:
123   case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
124      return 1;
125   case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
126      return 256; /* for GL3 */
127   case PIPE_CAP_MIN_TEXEL_OFFSET:
128      return -8;
129   case PIPE_CAP_MAX_TEXEL_OFFSET:
130      return 7;
131   case PIPE_CAP_CONDITIONAL_RENDER:
132      return 1;
133   case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
134   case PIPE_CAP_VERTEX_COLOR_UNCLAMPED: /* draw module */
135   case PIPE_CAP_VERTEX_COLOR_CLAMPED: /* draw module */
136      return 1;
137   case PIPE_CAP_GLSL_FEATURE_LEVEL:
138      return 130;
139   case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
140      return 0;
141   case PIPE_CAP_USER_VERTEX_BUFFERS:
142      return 1;
143   default:
144      return 0;
145   }
146}
147
148static int
149softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
150{
151#ifdef HAVE_LLVM
152   struct softpipe_screen *sp_screen = softpipe_screen(screen);
153#endif
154   switch(shader)
155   {
156   case PIPE_SHADER_FRAGMENT:
157      return tgsi_exec_get_shader_param(param);
158   case PIPE_SHADER_VERTEX:
159   case PIPE_SHADER_GEOMETRY:
160      switch (param) {
161      case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
162#ifdef HAVE_LLVM
163         if (sp_screen->use_llvm)
164            /* Softpipe doesn't yet know how to tell draw/llvm about textures */
165            return 0;
166#endif
167         return PIPE_MAX_VERTEX_SAMPLERS;
168      case PIPE_SHADER_CAP_INTEGERS:
169#ifdef HAVE_LLVM /* gallivm doesn't support integers yet */
170         if (sp_screen->use_llvm)
171            return 0;
172#endif
173         /* fallthrough */
174      default:
175         return draw_get_shader_param(shader, param);
176      }
177   default:
178      return 0;
179   }
180}
181
182static float
183softpipe_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
184{
185   switch (param) {
186   case PIPE_CAPF_MAX_LINE_WIDTH:
187      /* fall-through */
188   case PIPE_CAPF_MAX_LINE_WIDTH_AA:
189      return 255.0; /* arbitrary */
190   case PIPE_CAPF_MAX_POINT_WIDTH:
191      /* fall-through */
192   case PIPE_CAPF_MAX_POINT_WIDTH_AA:
193      return 255.0; /* arbitrary */
194   case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
195      return 16.0;
196   case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
197      return 16.0; /* arbitrary */
198   default:
199      return 0;
200   }
201}
202
203static int
204softpipe_get_video_param(struct pipe_screen *screen,
205                         enum pipe_video_profile profile,
206                         enum pipe_video_cap param)
207{
208   switch (param) {
209   case PIPE_VIDEO_CAP_SUPPORTED:
210       return vl_profile_supported(screen, profile);
211   case PIPE_VIDEO_CAP_NPOT_TEXTURES:
212      return 0;
213   case PIPE_VIDEO_CAP_MAX_WIDTH:
214   case PIPE_VIDEO_CAP_MAX_HEIGHT:
215      return vl_video_buffer_max_size(screen);
216   case PIPE_VIDEO_CAP_PREFERED_FORMAT:
217      return PIPE_FORMAT_NV12;
218   case PIPE_VIDEO_CAP_PREFERS_INTERLACED:
219      return false;
220   case PIPE_VIDEO_CAP_SUPPORTS_INTERLACED:
221      return false;
222   case PIPE_VIDEO_CAP_SUPPORTS_PROGRESSIVE:
223      return true;
224   default:
225      return 0;
226   }
227}
228
229/**
230 * Query format support for creating a texture, drawing surface, etc.
231 * \param format  the format to test
232 * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
233 */
234static boolean
235softpipe_is_format_supported( struct pipe_screen *screen,
236                              enum pipe_format format,
237                              enum pipe_texture_target target,
238                              unsigned sample_count,
239                              unsigned bind)
240{
241   struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
242   const struct util_format_description *format_desc;
243
244   assert(target == PIPE_BUFFER ||
245          target == PIPE_TEXTURE_1D ||
246          target == PIPE_TEXTURE_1D_ARRAY ||
247          target == PIPE_TEXTURE_2D ||
248          target == PIPE_TEXTURE_2D_ARRAY ||
249          target == PIPE_TEXTURE_RECT ||
250          target == PIPE_TEXTURE_3D ||
251          target == PIPE_TEXTURE_CUBE);
252
253   format_desc = util_format_description(format);
254   if (!format_desc)
255      return FALSE;
256
257   if (sample_count > 1)
258      return FALSE;
259
260   if (bind & (PIPE_BIND_DISPLAY_TARGET |
261               PIPE_BIND_SCANOUT |
262               PIPE_BIND_SHARED)) {
263      if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
264         return FALSE;
265   }
266
267   if (bind & PIPE_BIND_RENDER_TARGET) {
268      if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
269         return FALSE;
270
271      /*
272       * Although possible, it is unnatural to render into compressed or YUV
273       * surfaces. So disable these here to avoid going into weird paths
274       * inside the state trackers.
275       */
276      if (format_desc->block.width != 1 ||
277          format_desc->block.height != 1)
278         return FALSE;
279   }
280
281   if (bind & PIPE_BIND_DEPTH_STENCIL) {
282      if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
283         return FALSE;
284   }
285
286   /*
287    * All other operations (sampling, transfer, etc).
288    */
289
290   if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
291      return util_format_s3tc_enabled;
292   }
293
294   /*
295    * Everything else should be supported by u_format.
296    */
297   return TRUE;
298}
299
300
301static void
302softpipe_destroy_screen( struct pipe_screen *screen )
303{
304   struct softpipe_screen *sp_screen = softpipe_screen(screen);
305   struct sw_winsys *winsys = sp_screen->winsys;
306
307   if(winsys->destroy)
308      winsys->destroy(winsys);
309
310   FREE(screen);
311}
312
313
314/* This is often overriden by the co-state tracker.
315 */
316static void
317softpipe_flush_frontbuffer(struct pipe_screen *_screen,
318                           struct pipe_resource *resource,
319                           unsigned level, unsigned layer,
320                           void *context_private)
321{
322   struct softpipe_screen *screen = softpipe_screen(_screen);
323   struct sw_winsys *winsys = screen->winsys;
324   struct softpipe_resource *texture = softpipe_resource(resource);
325
326   assert(texture->dt);
327   if (texture->dt)
328      winsys->displaytarget_display(winsys, texture->dt, context_private);
329}
330
331/**
332 * Create a new pipe_screen object
333 * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
334 */
335struct pipe_screen *
336softpipe_create_screen(struct sw_winsys *winsys)
337{
338   struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
339
340   if (!screen)
341      return NULL;
342
343   screen->winsys = winsys;
344
345   screen->base.destroy = softpipe_destroy_screen;
346
347   screen->base.get_name = softpipe_get_name;
348   screen->base.get_vendor = softpipe_get_vendor;
349   screen->base.get_param = softpipe_get_param;
350   screen->base.get_shader_param = softpipe_get_shader_param;
351   screen->base.get_paramf = softpipe_get_paramf;
352   screen->base.get_video_param = softpipe_get_video_param;
353   screen->base.is_format_supported = softpipe_is_format_supported;
354   screen->base.is_video_format_supported = vl_video_buffer_is_format_supported;
355   screen->base.context_create = softpipe_create_context;
356   screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
357
358   screen->use_llvm = debug_get_option_use_llvm();
359
360   util_format_s3tc_init();
361
362   softpipe_init_screen_texture_funcs(&screen->base);
363   softpipe_init_screen_fence_funcs(&screen->base);
364
365   return &screen->base;
366}
367